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R  **ON A/C 401-499,
R R  122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC  53HH 55HH 56HH 54HH  W22W21 Y21Y20 
**ON A/C ALL
 Subtask 21-52-21-941-051
 C. Safety Precautions
 (1) On the panel 30VU make sure that: - The APU BLEED P/BSW is in the OFF position (the ON legend is off) and, - The ENGINE 1 and 2 BLEED P/BSW are in the off position (the OFF legends are on).
 (a) Put a WARNING NOTICE in position to tell persons not to operate these P/BSW.
 (2) On the HP ground connector put a WARNING NOTICE not to supply the ground air.

 

 Subtask 21-52-21-010-052
 D. Get access
 (1)
 Remove the applicable access panel (Ref. TASK 53-35-13-000-002). 191KB (192KB)

 (2)
 Remove the pipe assembly between the compressor inlet duct and the primary heat exchanger.

 (3)
 Remove the pipe assembly between the anti ice valve, bypass valve and the air cycle machine (Ref. TASK 21-52-23-000-002).

 (4)
 Remove the applicable bypass valve 10HH (11HH) (Ref. TASK 21-61-53-000-001)

 4. Procedure
_________ Subtask 21-52-21-020-053
 A. Removal of the Compressor Inlet Gasket
 (1) Removal of the screws CAUTION : WHEN YOU REMOVE THE SCREWS, MAKE SURE THAT YOU DO NOT CAUSE
_______ DAMAGE TO THE SCREWLOCKS. IF YOU CAUSE DAMAGE TO THE SCREWLOCKS, YOU MUST REMOVE THE UNIT AND SEND IT TO AN APPROVED REPAIR STATION.
 (a) Remove the screws (5) and the washers (4).
 (2)
 Remove the compressor inlet duct (3).

 (3)
 Remove and discard the compressor inlet gasket (2).
 NOTE : You must not install this gasket again.

 

____
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 TASK 21-52-21-400-002
 Installation of the Compressor Inlet Gasket
 WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM_______ FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
 NOTE : This procedure is just valid for the PN 1263A0000-02/-03 only.____
 1. Reason for the Job__________________
 Self Explanatory
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R R  No specific  Torque Wrench : range 0.00 to 1.20 m.daN (0.00 to 9.00 lbf.ft)
 B. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
R  2 2  GASKET GASKET  21-52-21 02 -04021-52-21 02B-040

 

 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-33-21-618-001  Pre-conditioning through the HP Ground Connection
 12-33-21-618-001  Pre-conditioning with the APU
 21-52-23-000-002  Removal of the Pipe Assembly between the Anti-Ice
 Valve (if installed), the Bypass Valve and the Air
 Cycle Machine
 21-52-23-400-001  Installation of the Pipe Assembly between the Main
 Heat Exchanger and the Air Cycle Machine
 21-52-23-400-002  Installation of the Pipe Assembly between the
 Anti-Ice Valve (if installed), the Bypass Valve and
 the Air Cycle Machine
 21-61-53-000-001  Removal of the Bypass Valve 10HH (30HH)
 21-61-53-400-001  Installation of the Bypass Valve 10HH (30HH)
 21-63-00-710-004  Operational Test of the Cockpit and Cabin Temperature
 Control with CFDS/MCDU
 24-41-00-861-002  Energize the Aircraft Electrical Circuits from the
 External Power
 24-41-00-862-002  De-energize the Aircraft Electrical Circuits Supplied
 from the External Power
 53-35-13-000-002  Removal of the Quick-Release Access Panels from the
 Belly Fairing Structure
 53-35-13-400-002  Installation of the Quick-Release Access Panels on
 the Belly Fairing Structure
　
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